<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

<form action="m.php" method="post" >
	<? 
	   $value = $_POST['str'];
	   $secret = substr(md5($value. '%imedia#2011'), -8);
	   echo $secret;
	?>
	str：<input name="str" value="<?=$value?>"/></br>
	<input type="submit" name="submit" value="查询"/>
</form>

</body>
</html>